LaBeouf, who played the son of Harrison Ford's whip-wielding adventurer in last summer's Kingdom Of The Crystal Skull, told the BBC that he expects a fifth franchise instalment to move forward soon.
"Steven just said that he cracked the story on it and I think they're gearing that up," he said, while promoting the release of Transformers: Revenge Of The Fallen in the UK.
The actor also spoke about the differences between working with Money Never Sleeps helmer Oliver Stone and his previous directors Spielberg and Michael Bay.
"Oliver Stone is a different filmmaker than I've experienced," he said. "He's a bit more rebellious than Steven, has a different edge than Mike. It's fun to get to work with your superheroes, these guys are Batman and Robin to me."
Indiana Jones And The Kingdom Of The Crystal Skull made over $780 million at the worldwide box office, helping Harrison Ford claim the title of Hollywood's highest paid actor last year.
2020 Update - Still waiting!